As presented in Table 2, in the subgroup analysis by ethnicity, the association between TNF-α −308G/A gene polymorphism and IHD risk was confirmed in both Caucasians (A vs G: OR = 1.23, 95% CI = 1.07–1.43) and Asians (A vs G: OR = 1.20, 95% CI = 1.06–1.35), but not in Indians (A vs G: OR = 1.48, 95% CI = 0.98–2.24). Here, TNF is linked to myocardial ischemia.